Preliminary PT4430 1.5A Line Driver DESCRIPTION FEATURES The PT4430 is a power line driver. The output stage is designed to drive up to 1.5A peak current into an isolation transformer or simple coil coupling to the mains. Power supply is single-sided 6V to 12V. The input stage contains an operational amplifier which can be configured as a unity gain follow buffer or used to provide the first stage of 4-pole low pass filter. In addition, the PT4430 offer a current limit programmable with a single resistor, R_Limit, together with a current limit flag. Supply voltage: 6V to 12V Flexible 4th-order filtering Current limit set by one resistor Thermal shutdown when temperature excess o 150 C Thermal warning set by voltage at pin V-warm Diagnostic flags level shifted to LVDD to simplify interface with external MCU - Thermal Warning Flag - Thermal Shutdown Flag - Over Current Flag QFN20 package with exposed thermal pad The device provides two independent thermal flags: a thermal warning flag to let the user know the internal junction temperature has reach the user thermal warning threshold and a thermal shutdown flag indicate the internal junction temperature has o exceeded 150 C. APPLICATIONS Power line communication driver in AMM and AMR metering system Valve, actuator, and motor driver Audio BLOCK DIAGRAM GND LVDD TW 20 AmpA+ AmpA- 19 18 TSD ILim 17 16 3 5 AmpA OUT 8 AmpB OUT 4 Operational Amplifier A AmpB- AmpB+ 12 13 Operational Amplifier B 1 6 EN Vcc 10 14 15 Vee V-warn R_Limit Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan PT4430 TW TSD ILim APPLICATION CIRCUIT 20 19 18 17 16 GND LVDD TW TSD ILim 3V~5.5V R5 EN NC ½ Vcc C1 1 EN 2 Vcom 3 AmpA+ 4 AmpA- 5 AmpA Out PT4430 R_Limit 15 V-warn 14 AmpB+ 13 AmpB- 12 V-warm ½ Vcc R1 Signal in R2 Vee Vcc Vcc 6 7 AmpB Out 8 9 11 Vee 10 R4 6V~12V R3 C2 Signal out BILL OF MATERIALS PRE1.0 Part Value Unit R1 4.7K Ω R2 R3 56K 10K Ω Ω R4 10K Ω R5 5.6 Ω C1 100n F C2 10μ F 2 November 2013 PT4430 ORDER INFORMATION Valid Part Number Package Type Top Code PT4430 20 Pins, QFN20 PT4430 PIN CONFIGURATION 20 19 18 17 16 1 15 2 14 PT4430 3 13 4 12 5 11 6 7 8 9 10 PIN DESCRIPTION Pin Name EN I/O IN Vcom Description Pin No. Enable/Shutdown input (High = Enable) 1 Don’t use 2 AmpA+ IN Positive (+) input of Op Amp A 3 AmpA- IN Negative (-) input of Op Amp A 4 AmpA Out OUT Output of Op Amp A 5 Vcc PWR Analog power supply connection 6 Vcc PWR Analog power supply connection 7 AmpB Out OUT Output of Op Amp B 8 AmpB Out OUT Output of Op Amp B 9 Vee GND Ground of analog circuit 10 Vee GND Ground of analog circuit 11 AmpB- IN Positive (-) input of Op Amp B 12 AmpB+ IN Negative (+) input of Op Amp B 13 V_warn IN Thermal warning temp set by a voltage determined by the ratio of two resistors 14 R_Limit IN Resistor set Op Amp B Current Limit 15 16 ILim OUT Current Limit Flag (High (=LVDD): Output current > ILimit set by R_Limit) TSD OUT Thermal Shutdown Flag (High (=LVDD): junction temperature ≥ 150 C 17 TW OUT Thermal Warming Flag (High: Junction Temperature > Temp. set by V_Warm) 18 LVDD PWR Digital power supply connection 19 GND GND Ground of digital circuit 20 Exposed Pad GND For thermal dissipation 21 PRE1.0 o 3 November 2013